<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>登录</title>
</head>
<body>
    <form action="{{ url_for('user.login') }}" method="post" >
    
        <p>
            用户id：<input type="text" name="user_id">
        </p>
        <p>
            <input type="submit">
        </p>
    </form>
</body>
</html>